Harness for cross-weaving



Nov. 20, 194-5. H L oN $389,258

HARNES S FOR CROS S -WEAVING Filed July 8, 1944 2 Sheets-Sheet 1 Nov.20, 1945. G. HILTON Y HARNESS FOR CROSS-WEAVING Filed July 8, 1944 2Sheets-She'et 2 Patented Nov. 20, 1945 HARNESS FOR CROSS-WEAVING GeorgeHilton, Northbridge, Mass, assignor to Steel Heddle ManufacturingCompany, Philadelphia, Pa., a corporation of Pennsylvania ApplicationJuly 8, 1944, Serial No. 544,026

7 6 Claims.

This invention relates to harness for crossweaving, and it isparticularly adaptablefor use in connection with the modern fiat steeldoup needles and lifting heddles now commonly used for cross-weaving.This invention serves to eliminate the jumper harness and the mechanismfor operating thesame customarily used in connection with such devices;and it also takes the place of the easer bar, and the springs or otherdevices used in connection therewith, for maintaining the requisitetension on the doup threads.

At thepresent time most of the lenoor crossweaving is done by means offlat steel harness of the type shown in the Kaufmann Patents No.1,037,150 and No. 1,037,151, in which there is provided, for pairs ofwarp ends, a flat steel doup needle or half heddle having an eye in theend thereof for controlling thedoup thread, and two standard or liftingheddles between which the ground thread extends and which alternativelyraise the doup thread on one side or'the other of the ground thread,thereby to bring about the requisite twist of the warp ends during theweaving operation. a

However, in the use ofharness of the type aforesaid, as wellalso inconnection with cer-' tain other types of doup harness, it has beenconsidered necessary to employa jumper harness including individualheddles through-which the ground ends are entered, and an easer bar,

sired tension on the doup ends yet permitting the same to be raised andlowered as required. Mechanism for operating the jumper harness in timedrelationship has also been required so that the proper times and to theproper extent. 1

The principal object of the present invention is to provide a simple andinexpensiveyet efficient device, which will be automatic in its action,which will eliminate ,the necessity of employing the jumper harnessandits actuating mechanism,

(Cl. 13950), I

usually spring controlled, for maintainingthe dcground ends are alsoraised and lowered at the Fig. 2 is a similar view in which, however,the doup needle, and the warp thread controlled thereby, is shown ashaving been raised by one of the standard or lifting heddles;

'Fig. 3 is a fragmentary elevational view of a portion of a loom with adevice embodying the main features of the present invention shown inconnection therewith;

Fig. 4 is'a top or plan view of the apparatus shown in Fig. 3; and

Fig. 5 is a section taken on the line'5-5 of Fig. 3.

Referring now more particularly to Figs. 1 and 2 of the drawings, in thearrangement there harness, some or all of said warp ends beingseparatedinto pairs of doup threads l5 and ground threads l6. Each doup end 'l5extends through the eye I! of a doup needle' I8 which preferably is ofthe type shown in the Kaufmann Patent No. 1,037,151,hereinbeforereferred to. The doup needle I8 is controlled in the usualmanner bythe standard or lifting heedles I9 and 20 and the,

ground end I 6 of a particular pair passes between the lifting heddlesl9 and 20 in the usual manner.

The device comprising the principal part of the present invention ispreferably interposed between the stop motion and the weaving harness,usually being positioned immediately above and in front of the crankshaft 2| of the loom. Said device consists essentially of a pair ofrods22 and 23 extending across the loom, said rods being mounted inrocker arms 24 at their respective ends. Each of the rocker arms 24 isprovided with a trunnion 25 which is pivotally mounted in a bearingblock 26.

The bearing block 26, on each side, is slidably mounted in a slot 21 ina supporting bracket '28 and normally is impelled downwardly. by-meansof a coil spring 29. The" lower end of .the coil spring 29 bears againstthe bearing block 26 and the upper end of said spring is'engaged by thelower endof an adjusting screw 30 which is threaded in the upper portionof the bracket 28.

The bracket 28 is fixedly secured to another bracket 3| by means ofbolts 32, and said bracket 3! is adjustably secured by means of a bolt33 to the slotted vertical leg portion of an angular bracket member 34..The horizontal portion of the angular bracket member 34 is adjustablyse In entering the warp in the loom the doup. 10

threads (5 are passed over the rearmost rod 22 and under the foremostrod whereas the; ground threads l6 are passed under the rearmost rod 22and over the foremost rod 23. The

operation of the device of the inventibnmay now" I be explained.

Referring now more particularly. to Figs. 1" of the drawings, it will benoted that when the. parts of theweaving harness are in neutralpositions, as shown in: Fig. L, the' transverse rods 22 and; 23 of thedevice of; the: present invention will occupy certain; positions,resulting from the relative tension of the doup threads: l5 and theground threads Hi. When, however, the warp is shedded ,for the purposeof. passing. the shuttleg. one or the other of; the lifting hedd'leswill be raised to caus the doup thread: l5 of. each pair to pass on oneside or the other of the ground thread l6 of said painaccordingtow-hichor the lifting hedd-lesis raised; all of. which will be readilyunderstood by those familiar with this art.

Whenthe' doup threads l5 are; raised,v on either side of. theirrespective ground threads it, this r causes a. greater tensionto be:imparted t the doup: threads I5 and would ordinarily, slacken groundthreads t6. Howevenwi-ththe device 01? the present invention when thedoup threads I'E are raised the foremost. bar 23 will thereby;

be raised and, by reason of the. pivotalmounting oi the rocker. arms 24,the rearmost rod 22 wilt be simultaneously lowered but to a much greaterextent, and therebyautomatically serve to take up' the slack of theground ends, it and: insure the properiormation: of. the. weave.

It wilt, of; course, be noted that the bearing blocks 26; inwhich: thetrunnions' 25 of the rocker arms: 24: are pivoted, are permitted alimited amount of vertical movement under the manlatable tensionimparted by the coil spring 29 and. the adjusting screw 39a arrangementpermits the rocker arms, and the transverse rods 22. and 23 carriedthereby, to be: unitarily raised to a limited extent and therebyprevents undue: tension being imparted to the warp. at certain times inthe operation oi the harness.

I claim:

l2. In harness for cross-weaving, in combination with means for raisingthe doup threads 21-- ternatively on one side or the other at theirrespective ground threads, of means actuated by the tension of the doupthreads for automatically'taking up the slack. of theground threadswhen. the doup threads are raised.

2. In harness for cross-weaving, the combination with means for raisingthe doup threads alternatively on one side or the other of theirrespective ground threads, of means controlled by the tension of thedoup threads for automatically taking up the slack of the groundthreads, and resilient, means for relieving the, tension of the"warp-when. required.

3. In harness for cross-weaving, in combination with means for raisingthe doup threads alternatively on one side or the other of theirrespective ground threads, of a pair of transverse rodsextending acrossthe loom, the doup threads passing, under one;v of said rods and theground threads passing under the other of said rods,

, and a positive connection between said rods whereby when one of saidrods is raised by the tension of said doup threads the other of saidrods will be automatically depressed and thereby take up the slack oftheground threads.

4'. In harness for cross-Weaving, incombina tiorr with means for raisingthe doup-threads alternatively on one side or the other of theirrespective ground threads; of a pair of transverse rods extending acrossthe loom, the doup threads passing under one of said rods andthe groundthreads passing-under theother of said rods, and freely pivoted rockerarms supporting said rods whereby when one of said rods is raisedby thetension ofsaid doupthreads the other of said rods will be depressed andthereby take up the slack of the ground threads.

5. In harness for cross-weaving, in combination with means forraisingthe doup threads alternatively on ne side or the other of theirrespective ground threads, of a pair of transverse rods extending acrossthe 10cm, the doup threads passing under one of said rods and the ground4 threads passing under the other of said rods,

rocker arms supporting said rods whereby when one of said,- rods israised by the tension of said 'doup threads the other of said rods willbe depressed and thereby take up the slack of the ground threads, andaspring mounting for said rockerarms permitting a limited unitaryelevation of said rocker arms and the transverse rods carried thereby.

ground threads, and a spring mounting for-said supporting meanspermitting a limited unitary elevationof said transverse rods to relievethe tension on the warp when required.

' V GEORGE HILTON.

